ErrorMailboxNotFound
Description of the error code "ErrorMailboxNotFound"
Domain: Exchange
Code: ErrorMailboxNotFound
Type: Configuration error (You are often able to resolve this type of error.)
Description: The mailbox does not exist. The mailbox address is wrong, or we do not have access to the mailbox.
Possible solution: Check that the mailbox address is correct.
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Exchange Server (EWS): check that the connecting service account is allowed to access the mailbox.
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Exchange Online (Microsoft Graph): check that the mailbox exists in your tenant and, if your organization restricts AskCody's access, that the mailbox is within the allowed scope. See Limiting AskCody's access in Exchange Online.